Adjustable table for masonry saws



Sept. 28, 1943. R. MOFFAT ET AL ADJUSTABLE TABLE FOR MASONRY SAWS Filed April 12, 1943 7 m W m: m E

O O 0 O O Patented Sept. 28, 1943.

Q'APJIUSVTAVIASLEITABLE FOR MASONRY- SAWS I This invention relates to improvements in masonry saws of the character employed for cutting tiles, refractory shapes, etc., and more particularly to an adjustable table for masonry saws of the type illustrated in United States Letters Patent lid-2,171,024, granted August 29, 1939.

In employing such saws in industrial work, as for example, in the production of refractory shapes for furnace linings and the like, we have found the same impracticable for certain angular cuts. Such shapes as arch bricks, side skews, feather edges and the like could not be readily produced on such saws, and necessitated hand hipping and grinding operations Which'mateially increased the cost of the lining or other ,ob being done.

Our invention has in view to provide an adjustable table mounted in proper relation to the cutting plane of the saw so as to enable the production of a selected angular cut face on the workpiece.

he invention further contemplates the constr lotion and mounting of such a table to enable the same to be readily applied to existing masonry saws of the character stated.

Additional objects and advantages of our invention will become apparent from the following description taken in connection with the accompanying drawing, wherein:

Fig. 1 is a side elevational View of a masonry saw illustrating an embodiment of our invention therein;

Fig. 2 is an'end elevational view thereof; and

Fig. 3 illustrates several refractory shapes which may be produced by the present invention.

Referring to the drawing, the masonry saw illustrated generally includes an open framework 2 including a pair of spaced parallelhorizontal bed rails 3. At one end of the frame 2, a plat-1 form '5 is pivotally mounted on uprights 5, the latter being slotted at 6 for adjustment of the vertical position of said platform. Said platform rctatably mounts a masonry saw I and a motorB work to be cut at an angle to the plane of the saw, to enable the cutting of tiles, refractory shapes, etc., like those illustrated in Fig. 3, wherein A is an arch brick, B is a side skew, and C is a feather edge, all of which shapes are so designated in the art and used in the construction of refractory linings for-furnaces and the like.

All of such shapes may be cut from refractory blocks or bricks of rectangular form, and our invention enables the cutting of the desired forms therefrom' on the job in accordance with the desired dimensions, including the production of one or more angular faces on said shapes.

For this purpose, the carriage I2 is provided with an adjustable table I4, hinged at I5 to one side of the carriage for pivotal movement of the table about an axis parallel to the plane of the saw I, whereby the table may be angularly disposed in intersecting relation to the cutting plane of the saw. The free end portion of the table I4 is provided with a centrally located segment I6, pivotally connected at I! to the table and extending downwardly through an apertured dexing marks thereon, graduated to indicate'theangularity of the table I4 above the horizontal for driving the saw through a belt drive 9. The

the bed rails 3 by means of grooved rollers I3,

whereby the carriage I2 may be moved back and forth beneath the rotating saw I. Our invention hasto do'with means for supporting the up to a maximum of 45 degrees, said indexing marks coacting with a selected fixed point upon the carriage I2, as for example, the upper face of the bracket I8.

By means of said adjustable table I4, a masonry saw of the type illustrated may be readily adapted for cutting the shapes hereinbefore described. By adjusting said table to the proper angle in accordance with the relation of the angle of the face to be cut with one face of the refractory block or workpiece, the operator may readily cut a workpiece thereon by relative motion of the carriage I2 and saw 'I. The operation of our invention is clearly illustrated in the dotted line position of Fig. 2, wherein a'refractory block is being cut to form a pair of side 7 skews B.

The adjusting segment I6, itsattachment I! to the table and the clamping bracket I8, are disposed so as not to interfere with the masonry saw structure proper, thereby readily permitting the installation of our invention to existing masonry saws without the necessity of materially altering the latter. Thus, the'segment I6 moves in a path outwardly beyond the bed rails 3 and between the members of the open framework 2 without interference. A masonry saw provided with the adjustable table of our invention is thereby made capable of cutting in any special and angular shapes of tile, refractory bricks and the like.

Various changes and modifications are contemplated within the scope of the following claims.

We claim:

1. In a masonry saw of the characterdescribed having a Work-receiving carriage and a saw movable in relation thereto, an adjustable workreceiving table on the carriage hinged thereto along one edge of said carriage for pivotal movement about an axis parallel to the cutting plane of the saw While intersecting said cutting plane,

a segment secured to the free end portion of the table, and means on the carriage for securing the segment and table in adjusted position.

2. In a masonry saw of the character described having a supporting framework, a work-receiving carriage and a saw movable in relation thereto, an adjustable work-receiving table on the carriage hinged thereto alongone edge of said carriage for pivotal movement about an axis parallel to the cutting plane of the saw while intersecting said cutting plane, a segment secured to the free end portion of the table, and means on the carriage for securing the segment and table in adjusted position, said segment being disposed and movable in a path spaced in non-interfering position with said framework of the saw proper.

- ROBERT MOFFAT.

LEO J. WRIGHT. 

